I've also been told that 06 had 58x but mine is an 06 and it has the 24. Now I could have been lied to and it might really be an 05 or something. Black is 24 and grey is 58x. Ya'll are correct that the cam sensor is a hall effect and what that means is it produces a voltage as it goes around. Every time a tooth hits the magnet it sends a voltage. A fluke meter might not read fast enough to see this but if you crank it without starting it, then it might read.

You can actually hold the sensor in your hand and take a piece of metal and go back and forth past the magnet really fast and the meter will then read also.

Another is to take a test light and back probe it and the light should blink as you start it.

Lee

 

Here I am again, sorry. I meant to add this in my other post. I also disagree with the GM guy that said it will run without the cam sensor. *LASON* is right when he says the cam sensor tells the MSD box when to fire. I found this out on my LS2. It COULD be true on an injected motor with a GM computer but not with the MSD box on a carbed motor. Also, *SUPERWAKE502* might have a good idea on checking sensor with a test light. Ron

 

ok, i was curious-back to Lason's orig question
i disc my coils, hooked up the laptop, turned the ign on to make sure i was in the current program in the msd box, and max'ed my dials so i could read them
cranking the engine over, with spark plugs in place, i read aprx.157-158 rpm on the dial-so if your not reading anything on your laptop, there is a problem
make sure your pill isnt in the box, and that you are currently reading the program on your computer-if needed, you could download from msd to laptop to be sure
on another note, i have run mine with the map disc, but was running the timing off the rpm chart
if you were running the map timing, then i would suspect it might not work, but if it did, might read the timing as 1 astmosphere
i use my map now, because of the supercharger, but might switch back to the rpm timing, one less thing to worry about failing, lol
Lason, hope this tells you what you were looking for

 

Thank you, that is exactly what I was looking for. I know my box is bad and I know how it happened, just wanted to confirm it should read cranking rpms. Thanks alot.

 

What happened to the box?